Comparação de vacinas comerciais intranasal e intramuscular contra viroses respiratórias em bovinos confinados

Abstract

The bovine respiratory complex (CRB) is a disease relevant to bovine production, damage to production, motivating studies on its prophylaxis. Thus, the objective of this work was to review the subject and evaluate the influence of commercial intranasal and intramuscular vaccines against CRB on health and production and weight performance in confined cattle through assessments of eye temperature, nasal secretion, gain weight, dosage of IgA, IgG and American haptoglobin on days 0, 7, 44 and 79 from the confinement entry data and in the lesions of lung lesions without slaughter day (day 87) in 3 groups of confined beef cattle , control group (CO), intranasal group (IN) vaccinated with intranasal vaccine in a single dose and intramuscular group (IM), with two doses of the intramuscular vaccine. The IM group showed greater weight gain in IN and an even lower frequency of lung injuries in CO and IN. The IN group has more clinical indicators of respiratory disease in D7, shows less weight gain, in addition to higher indicators of pneumonia, also shows a decrease in the progress of time in relation to IgA, has higher titers of IgG from D44. It can be concluded that an IM vaccination in two doses causes results with a higher indication of use for applied situations, showing animals with lower disease rates, either clinical or laboratory, in addition to greater weight gain.